Tensioning tool



' Jain. is, 1940. N BLETSO 2,187,298

TENSIONING TOOL Filed June 23, 1957 4 Sheets-Sheet l Inventor Zia/c5 N. BLETSO,

Jan. 16, 1940. B. N. BLETSO TENSIONING TOOL Filed June 25, 1937 4 Sheets-Sheet 2 bweizlof BEL/c5 N. 5157260;

aways,

Jan. 16, 1940. BLETSQ 2,187,298

TENSIONING TOOL Filed June 23, 193'? 4 Sheets-Sheet 4 52065 N. BLETSO,

parent after referring to .thedrawingsin which:

ucFigure 1 is Na sideelevation of the tool of the Patented Jan t U by we TENSIQNINGTOOL" I I Bruce N.Bletso,; Cleveland Heights, Ohio, assign or to The American Steel and Wire Company of New Jersey, at corporationof New Jersey Application: June 23, 1937, Serial No. 150,002

e 4 Claims. (cuss-51y This invention relates to the artwof applying and sealing tying elements, :such as bale ties, etc., to various types of packages and other objects,

i and particularly to elements, i

a Itis among the application of the tyin in any mannerjdesired; it

afterwhich said tying elements may be sealed The foregoing and other objects will be apinvention. n

:fFigure 4 is a of Figure Figure 2 is a sectional view on the line II-JI f Figure 1. Y i y l 1 Figure 3 is a plan: l v sectional view on the line IV- IV Figure dis a sectional viewy on the line V -V of Figured. v l y n j Figure 6 is a view similar to Figure but showing :the elements thereof in another operativeposition. 1 i i lustrating the manner inwhich the tool islreleased from the tying elements. after thesealing thereof has beenqacccomplished.

' Referring more particularly to the drawings; the numeral 2 designatesa base forthe tool Of a v the invention. This base 2y supports a pair of ,vertical uprights leach of which apertured,

asat 5, to receive a rotatable eccentrictbushing I. fl-A rotatabie shaft 8 is disposed to extend through the rotatableeccentrid bushings I and carries on one of itsends a rigidly securedpinchwheel I0, the periphery of which is knurled, as

shown at 12. The mid-portion of the rotatable shaft 8 carries a rigidly secured ratchet wheel M, the ratchet teeth of which are shown at Hi.

The ratchet-wheel l4 pivotally carries the ends a of a pair of parallel levers l6 to whichthere is secured an operating handle IT, therlatterbeing provided with a downwardly extending lug IB for contacting the upper face of the base 2 in Jorderto preventitsexcessive downward movement. i

Thepivotedparallel levers carrytatransverse pin 20 on which there is mounted a pivoted pawl 2 i. The pivoted parallel levers I6also carry a pin 22 on which there ismounted a spring 23 for resiliently holding the pivoted pawl 21 against theratchet teeth l5offtheratcheflwheel ll.

Each of thepivoted parallellevers I6 carries alug 25 which engages an abutment provided the objects of the present invenr tion to provideanovel toolfor rapidly and easily applying tying elements 1 of the class described,

Figure 'Tis an elevation,-partlyin section, il-

therebetween is prevented. l

on the upper face of thezbase 2 when said levers arein their uppermost positions. i g H H The rotatable shaft 8 pivotally carriesthe ends of a bifurcated lever 28. The pivoted ends of this bifurcated lever 28 are interlocked with the 5 rotatable eccentric bushings 'l, as shown'in Figures 3 and 4, whereby these elementsmay be rotated in unison. That is to say, the upward movement of the bifurcated lever 28 rotates the rotatable eccentric bushings I and thereby low ers the pinch-wheel I0 toward the upper faceof n the base 2.; Immediately below the knurled periphery l2 of the pinchewheel I0 the base 2 carries a block 30 having a knurledfupper face 3|; Thepivoted ends of the bifurcatedlever 28 carry a pair of lugs 33 which engagewa pair of verj tically extending abutments 34 onthe base 2.

Immediately adjacent its vertically extending abutments? 34, the base 2 carries a pin 3Bon which there is mounteda pivoted'pawl 31. This e v pivoted pawl 31 is resiliently held againstthe i ratchet teeth P5 of thmatohet-wheel M by a spring 38;} i

Immediately below the operating handle I! on i the pivoted parallel'levers l6 thelbase 2 is provided witha lateral extension 39. This lateral extension 39 carriesa block 40 having a knurled upper face M. The function of the lateral extension 39 of the base 2 is to enable the raising of the overlapped tying elements from the suri faces of the objects to which theyyare being applied. .That is, the tying elementsare supported between the blocks 30fand 40, and buckling Inoperation: The tying element (i. e.', a piece of box strapping not shown) isplaced around the object, such as a bale, with itsends overlapped.

The operating lever 11 on the parallel pivoted levers l6 and the bifurcated lever 28 are placed [in-downward position and the base 2 appliedygb to the overlapped ends of the tyingelement. In this position the inner of the overlappedends of the tying elementrests upon the blocks 30 and 40. Thebifurcated lever 28 is then raised, rotating on the axis A whereupon the pinch-wheel Ill is lowered onto the upper of the overlapped ends of the tying element. This clamps the overlapped ends of the tying element together; The counter-clockwise rotation of the ratchetwheel {4 (see Figures 5 and6) isprevented by the pawl 5 31, and the loosening of the tying element thereby prevented. The. operating lever I] on the parallel pivoted levers I6 is then raised rotating on the axis B until the lugs 25 thereon engage the abutment 26 on the base 2. The operating handle is then lowered, causing the pawl 2| to engage the ratchet teeth l5 of the ratchet-wheel l4, whereby the latter is given partial clockwise I rotation. This movement of the operating handle I 1 is repeated until the pinch-Wheel ID has sufliciently ten sioned the tying element. The overlapped ends of the tying element are then sealed in any suitable manner (not shown).

After the seal has been made, the bifurcated lever 28 is moved v from the vertical to the horizontal. position. This, by means of the eccentric arrangement of the bushings Ion the shaft 8,

lifts the pinch-wheel I0 from the tying element to release it. The movement of" the bifurcated lever 28 from the vertical to the horizontal position is not extremely easy because the knurled periphery [2 of the pinch-wheel I0 is jammed hard into the outer of the overlapped tying ele ments. Therefore, as previously stated, the operating handlell is swung up into vertical position until the lugs on the pivoted parallel levers l6 engage theabutment 26 on the base 2.

' Then, by pressing the levers ll and 23 together,

as shown in Figure 7, the lever 28, because of its eccentric: mounting about the axis A on the rotatable shaft 8,is caused to initially'move towards the lever ll, which acts tostart a release of the pi ch-wheel l0 so that further release of the same is very easily accomplished by moving the levers l1 and 28 simultaneously from the vertical to the'horizontal position.

- While I have shown and described one specific embodiment of my invention, it will be underrotatable shaft, said pinch-wheel being disposed "opposite said pinch-block and adapted for oooperation therewith, a manually operable lever forrotating said eccentric bushing, said lever being constructed and arrangedto occupy a position at substantial-right-angles to the axis of .the box band when said pinch-wheel is most adjacent said pinch-block, and manually operable means for rotating said pinch-wheel.

2. A tensioning tool for a box-band or the like comprising, in combination, a base member, a stationary pinch-block carried by said base member,-.a rotatable eccentric bushing carried by said base member, a rotatable shaft in said eccentric bushing, a pinch-wheel secured to said rotatable-shaft, said pinch-wheel being disposed opposite said'pinch-block and adapted for cooperation therewith, "a manually operable lever for operated ratchet lever when it rotating said eccentric bushing, said lever being constructed and arranged to occupy a position at substantial right-angles to the axis of the box band when said pinch-wheel is most adjacent said pinch-block, and a manually operable ratchet lever for rotating said pinch-wheel, said manually operable ratchet lever being capable of movement into close adjacency with respect to said first-named lever when the latter is at substantial right-angles to the axis of the box band.

1,3. A tensioning tool for a box-band or the like comprising, in combination, a base member constructed and arranged to support said boxband at spaced points, a stationary pinch-block carried by said base member, a rotatable eccentric bushing carried by said base member, a rotatable shaft in said eccentric bushing, a pinch-wheel secured to said rotatable shaft, said pinch-wheel being disposed opposite said pinchblock and adapted for cooperation therewith, a manually operable lever for rotating said eccentrio bushing, said lever being constructed and arranged to occupy a position at substantial right-angles to the axis of the box band when said pinch-Wheel is most adjacent said pinchblock, and amanually operable ratchet lever for rotating said pinchwheel, said manually operated ratchet lever being capable of movement into close adjacency with respect to said firstnamed lever when the latterlis at substantial right-angles to the axis of the box band.

4. A tensioning tool for a box-band or the like comprising, in combination, a base member constructed and arranged to support said boxband at spaced points, a stationary pinch-block carried by said base member, a rotatable eccentric bushing carried by said base member, a rotatable shaft in said eccentric bushing, a pinchwheel secured to said rotatable shaft, said pinchwheel being disposed opposite said pinch-block and adapted for cooperation therewith, a manually operable lever for rotating said eccentric bushing, said lever being constructed and, arranged to occupy a position at substantial rightangles tothe axis of the box-band when said pinch-wheel is most adjacent said pinch-block, a manually operable ratchet lever for rotating saidpinch-wheel, said manually operated ratchet lever being capable of movement into close adjacency with respect to said first-named lever when the latter. is at substantial right-angles to the axis of the box-band, and means for arresting the upward movement of said manually righteangles to the axis of the box-band whereby said levers may be gripped in unison and saidmanually operated ratchet lever utilized to establishcan added leverage for imparting initial movement to said first-named lever in its downward movement.

.. BRUCE N. BLETSO.

is at substantial 

